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Cavity-Enhanced Emission from a Silicon T Center

  • Fariba Islam
    Fariba Islam
    Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
    Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
    More by Fariba Islam
  • Chang-Min Lee
    Chang-Min Lee
    Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
    Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
  • Samuel Harper
    Samuel Harper
    Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
    Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
  • Mohammad Habibur Rahaman
    Mohammad Habibur Rahaman
    Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
    Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
  • Yuqi Zhao
    Yuqi Zhao
    Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
    Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
    More by Yuqi Zhao
  • Neelesh Kumar Vij
    Neelesh Kumar Vij
    Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
    Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
  • , and 
  • Edo Waks*
    Edo Waks
    Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
    Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
    *[email protected]
    More by Edo Waks
Cite this: Nano Lett. 2024, 24, 1, 319–325
Publication Date (Web):December 26, 2023
https://doi.org/10.1021/acs.nanolett.3c04056
Copyright © 2023 American Chemical Society

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    Abstract

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    Silicon T centers present the promising possibility of generating optically active spin qubits in an all-silicon device. However, these color centers exhibit long excited state lifetimes and a low Debye–Waller factor, making them dim emitters with low efficiency into the zero-phonon line. Nanophotonic cavities can solve this problem by enhancing radiative emission into the zero-phonon line through the Purcell effect. In this work, we demonstrate cavity-enhanced emission from a single T center in a nanophotonic cavity. We achieve a 2 order of magnitude increase in the brightness of the zero-phonon line relative to waveguide-coupled emitters, a 23% collection efficiency from emitter to fiber, and an overall emission efficiency into the zero-phonon line of 63.4%. We also observe a lifetime enhancement of 5, corresponding to a Purcell factor exceeding 18 when correcting for the emission to the phonon sideband. These results pave the way toward efficient spin–photon interfaces in silicon photonics.

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.nanolett.3c04056.

    • Photon budget calculations, emitter brightness under continuous-wave excitation, lifetime data for emitters in a nanobeam, calculation of the Purcell factor, and detuning dependence of the Purcell effect (PDF)

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